[Haskell-cafe] Fwd: Fwd: Compatibility etiquette for apps, with cabal sandboxes and `stack`

[Sven Panne]

[... and now to the whole list, I hate gmail's defaults... :-]

---------- Forwarded message ----------
From: Sven Panne <svenpanne at gmail.com>
Date: 2015-11-29 21:12 GMT+01:00
Subject: Re: [Haskell-cafe] Fwd: Compatibility etiquette for apps, with
cabal sandboxes and `stack`
To: Imants Cekusins <imantc at gmail.com>


2015-11-29 20:52 GMT+01:00 Imants Cekusins <imantc at gmail.com>:

> [...] What if the top package (in namespace)  contained major version?
>
> E.g. Cabal_1_22
>
> below packages might use minor versions - basically, whenever api changes,
> change the version part of the affected package. [...]
>
As a developer, what should I import if my program/library works with e.g.
the version range [1.20 .. 1.23]? It definitely can't be

   import Cabal_1_23.Foo.Bar

because if it later still works with e.g. 1.24, I would have to rename all
my imports. And always using the lower bound is probably too restrictive,
unless I'm mistaken... In general I think it's a bad idea to spread build
dependencies all over the code.

Cheers,
   S.
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